<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

    <script src="../../vue.js"></script>
</head>
<body>

<div id="app" v-cloak>


</div>

<script>

    var arr = [3, 2, 1, 4,9];

    let bl = arr.every(item => item > 5);

   let b= arr.some(item=>item<5);

  let c= arr.reduce((item1,item2)=>{
       return item1+item2;
   })

    console.log(bl);
    console.log(b);
    console.log(c);


    let vm = new Vue({

        el: '#app',
        data: {}
    })
</script>

</body>
</html>